Karl hedeen



K. HEDEEN VALVE GUIDE CLEANER Nov. 17, 1925.

Filed Dec. 1'7; 1925 INVENTOR. Karl He deen.

- ATTORNEY.

Patented Nov. 17, 1925.

UNITED STATES PATENT oFF 1cs.-;'f

KARL HEDEEN, or CHICAGO, ILLInoIsnssI Non T0 FLEMING MACHINE COMPANY,

OF woncns'rnn, MASSACHUSETTS, A CORPORATION or MASSACHUSETTS...

7 To all whom it may concern:

Be it known that I, KARL HEDEEN, a citizen of the United States, residing at Chicago, in the county of Cook and State of 5 Illinois, have invented new and useful Improvements in Valve-Guide Cleaners, of which the following is a specification.

This invention relates to improvements in cleaners for valve stem guide for removing carbon and other foreign matter from the valve stem guides or bearings of internal combustion engines.

in the operation of such engines that the guides or bearings in which the valve stems are located become more or less filled with carbon, oil, and other foreign substances practically rendering the operation of the inlet and exhaust valves inoperative causing the valve stems to stick in their bearings, whereby the efficient operation of the engine is very much reduced, resulting in a material loss of power.

Various devices have been proposed for removing the carbon, oil, etc., from these guides or bearings. Oftentimes the opening is reamed out and an oversize valve stem is substituted for the regular size. Again, the guide is reamed and a bushing is in- These methods are not only expensive in practice but result in delays in completing the operation which is an important factor to be considered. My device is not only an inexpensive tool but its use enables the operator to remove the carbon and thoroughly clean the guide or hearing for the stem in a very short space of time.

Broadly the device comprises a member having bearing portions for engaging the valve stem guide or bearing, and a scraping or cleaning part which is composed of a plurality of twisted wires which are located between the bearing portions of the device the diameter of which wires is slightly larger than the diameter of the guide or bearings The device is designed to be rotated by any suitable means attaching it to a drill press or small motor which may be attached directly thereto.

Referring briefly to the drawings:

Fi ure 1 is an elevational view of the compiete device showing the spaced bearing portions and twisted cleaning wires.

Figure 2 is a bottom plan view of Fig. 1.

Figure 3 is an enlarged detail view showserted.

to be cleaned.

' 'v Lvn-euimi' CLEANER.-

Application filed. December 17, 1923.; Serial No. 681376;

to the wires, and

valve stem.

It is a well known fact is indicated 1.

ing the manner of constructing the cleaner. Figure 4: IS a view similar to Fig. 3 but showing the manner of imparting a twist Figure 5 is a view showing how the device is used to clean the guides for the Referring to the drawings in detail:

1 designates the shaft or spindle of the valve guide cleaning device. 2 and 3 the collars thereon which serve as bearings for the device when inserted in the opening which receives the valve-stem as shown in Fig. 5. A portion of the engine casting Each. of these collars are formed with an annular recess i and 5 in which is inserted the ends of the cleaning wires 6, as shown. The parts are assembled as follows: The collar 2 is secured to the stem 1 by means of the solder 2 the ends of the wires are inserted inthese recesses and secured therein by pouring in melted solder.

bustion engine. 7

The collar 3 is now moved along the spindle 1 in order to cause the wires to bow outward as shown in Fig. 3. The collar 3 is now rotated to twist the wires, see Fig. 4, together into thepositions shown. The collar 3 is now secured to the shaft 1 by means of the solder 3" shown in Fig. 4. The rotation of the collar 3 isindicated by the arrow 7'. It should be understood that the group of twisted wires 6 is slightlygreater in diameter than the valve stem guide opening 8, in order that these wires may engage the walls of the opening and thoroughly clean the same when the device is rotated by any suitable motive power as indicated by the electric motor 9. The stem 1 is understood to be attached to the motor by the chuck 10. The collars 2 and?) serve as bearings in the opening 8 for the cleaning device when rotated. In use the device is moved back and forth through the opening 8 in order to thoroughly clean the entire length of the opening of carbon and other substances. The open mesh work serves to collect the particles of removed carbon. It will therefore be seen that I have provided a very inexpensive and efficient device for removing the carbon from the valve stem guides or openings of an internal com- It is to be understood that the wires. 6 f are composed of suitable material as mildly;

tempered steel. Also, the device is made in different sizes to accommodate machines having different sizes of openings.

What I claim is:

A device for cleaning the openings in Which valve stems of an internal combustion engine are placed comprising a rotatable shaft, two bearing collars, permanently secured to the shaft, each collar having an annular recess in its inner ends, Wires having their ends secured in the recesses, the

position of the collars on the shaft causing the Wires to assume a bowed out and a twisted position relative to the axis of the shaft, the collars being of asize to provide bearing surfaces When the device is inserted in a valve stem opening to be cleaned, and said Wires being circular in cross section to produce a smooth finished surface in the opening when the shaft is rotated.

KARL HEDEEN. 

